Electric resistance.



N0.684,79|. Patented 0ct.22.l90l.

I E. RCARICHOFF.

ELECTRIG RESISTANCE.

I Application filed Aug. 1. 1901.)

(No Model.)

- I INSULATING MATERIAL D ,F ooooooooo INVENTOR Eagene if dzrzlkoft flaw14w.

WITNESSES:

ATTORN THE sows PEYHRG 00.. PHOYG-LITHQ. WASHINGTON, n. c.

UNITED STATES PATENT ()FFrcE.

EUGENE R. CARIOHOFF, OF EAST ORANGE, NEWV JERSEY, ASSIGNOR TO SPRAGUEELECTRIC COMPANY, OF NE\V YORK, N. Y., A CORPORA- TION OF NE\V JERSEY.

ELECTRIC RESISTANCE.

EEEQJLFICtiLEQN forming part of Letters Patent No. 684,791, datedOctober 22, 1901.

Application filed August 1, 1901. Serial No. 70,466. (No model.)

To @135 whom it may concern;

Be it known that I, EUGENE R. GARICHOFF, a citizen of the United States,residing at East Orange, Essex county, New Jersey, have invented certainnew and useful Improvements in Resistances, of which the following is afull, clear, and exact description.

My invention relates to electrical appliance, and particularly toresistance for car use.

An object of my invention is to provide a construction of a simple andeconomical form which may be readily installed, so that in the event ofbreakage new parts may be inserted easily and quickly.

Other objects which I have sought to attain are lightness and durabilityof construction, safety, and effectiveness of operation.

In the drawings, Figure l is a side elevation of a railway-car having myimproved resistance suspended beneath it. Fig. 2 is arelatively-enlarged detail view of the preferred form of resistanceshown in Fig. 1. Fig. 3 is a view partly in section upon line X X, Fig.2.

A is a car-body. B is a supporting-beam in turn carried by said body oran extension therefrom.

O is a suitable insulation, preferably in the form of blocks of graniteor other insulating material, which insulation maybe secured to the beamB.

D is the resistance proper, which is in the form of a grid or gridscomposed of looped strips-for example, wire of suitable material tofurnish the desired resistance. These grids are preferably made of auniform length and are preferably provided at even intervals with eyes DD, through which may pass suitable screws or bolts E, by which means thegrids are attached to the insulatingblocks 0. To facilitate connection,suitable holes or recesses may first be formed in the insulation, carebeing taken to arrange the same at regular intervals, so that eyes D Dof the grid or grids will register therewith. It is my custom to formthese grids of the same length as above stated; but in some cases thesize of the wire employed may be changed to give more or lessresistance, as required. Obviously any desired number of sections may beemployed. When more than one section is used, the same may be coupledtogether by means of bridging-pieces F F.

M N are terminals which may be connected to the resistance at any pointor pointsfor example, as shown in the drawings, in which the terminals MN are connected to the brir. gingpieces F F. A bolt or screw passingthrough any eye of the grid furnishes ready means for attaching theseterminals at convenient points.

In use the grids are suspended beneath the car, where they are exposedto free air circulation, and areconsequently well ventilated. By thismeans the temperature of the resistance may be kept down. By placing theresistance underneath the car and securing it to the aforesaid sectionsof granite block it is well insulated from all conductive material andthere is no danger of overheating or setting fire to any portion of thecar, by reason of the fact that there is no possibility of the car-bodycoming in contact with said resistance.

The open accessible location of the resist ance makes it possible toeasily and quickly replace or change the resistance and also permits ofthe rapid inspection thereof.

In actual practice I form the looped grid of cast-iron, which I findgives superior results, not only in that cast-iron is an effect iveresistance material, but it also is cheap of looped strips of resistancematerial, and l said blocks, and means for connecting tormi-- :0 meansforconnectingsaid grids to said blocks, nals to said grids. andineans'foreft'ecting terminal connections. Signed at New York, N. Y.,this 19th day 3. A resistance for car use, comprising seeof July, 1901.

5 tional resistance-grids, sectional insulating- 1 a 1 1 blocks forsupporting said grids, means ar- EUGENE ranged at desired intervals forfacilitating the Witnesses: connection of said grids to said blocks,means R. C. MITCHELL, for eiiecting the connection of said grids to L.VREELAND.

